Bearing effect

Running unbal- Preventive maintenance and operator checklist anced, vibration inspections due to worn bear-, effective vibration monitor/shutdown device ings or other mechanical problem such as product accumulation behind filter screen. ... 

The pressure drop reduction is said to occur due to the ball-bearing effect of the particulates. The magnitude of pressure drop reduction is a function of particle size and particle characteristics (e.g., density). However, some researchers argue that it is an unsteady-state phenomenon on that cannot be relied on to occur consistently. 

In fresh concrete mixes the presence of fly ash often reduces the water requirement for a given workability (Rattanussom et al, 1987 Dhir et al, 1988). This has been attributed to the spherical geometry and smooth surface of the fly ash particles (ball bearing effect). Another factor that also improves workability is the increased dispersion of the clinker grains in the presence of fly ash. Because of the overall reduced initial formation of... 

AASHTO LRFD Article 14.7.8.3 limits instantaneous compressive deformation under total service load to not more than 10% of the thickness of the unstressed disc. It additionally limits additional deformation due to creep to no more than 8% of the unstressed disc thickness. This article further proscribes lift off of component elements of the disc bearing, effectively imposing limits on allowable service limit state rotation. 

PAPER XXI(i) Study of the lubricant film in rolling bearings effects of roughness... 

Study of the Lubricant Film In Rolling Bearings Effects of Roughness, P. LEENDERS and L.G. HOUPERT... 

To highlight the phenomenon of the bearing effect, two methods are developed. The first one consists in varying the convergent angle. The second consists in varying the size of the IF-WS2 particles and testing them with the same experimental conditions. 

Observations of wear scars on pins and flats clearly show this phenomenon of the bearing effect (Figure 2.26), in particular on the flat on which a central zone and two lateral zones can be observed (Figure 2.26(d)). Moreover, the wear scar observed on the pin has a lower diameter (120 pm) than the corresponding Hertz diameter (136 pm), indicating that the pressure inside the contact area is lower than the theoretical calculated pressure. 

---